package com.hmdp.service.impl;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result getlist() {
        //查询redis是否有
        String s = stringRedisTemplate.opsForValue().get("cache:shoptype");
        //有
        if (StrUtil.isNotBlank(s)) {
            List<ShopType> shopTypes = JSONUtil.toList(s, ShopType.class);
            return Result.ok(shopTypes);
        }
        //没有
        //查询数据库
        List<ShopType> list = query().list();
        if (list==null || list.isEmpty()){
            return Result.fail("店铺信息不存在");
        }
        //将数据存入redis
        stringRedisTemplate.opsForValue().set("cache:shoptype",JSONUtil.toJsonStr(list));
        return Result.ok(list);
    }
}
